Because more creatures means more food in the tank I’ve been concerned with water quality. So last night shortly after the lights switched over to the twilight of actinic only light I ran the tests. Ph was a worrisome 7.9 — well below what it should be after a full day of light. Everything else was optimal. Calcium was 440. Since the tank didn’t need topping off I waited until this morning to add the tsp. of superbuffer. Though the Ph is low, it was more stable than expected. When tested under dawn actinic lighting (before adding superbuffer) it was still 7.9 — which is unusual. Usually there’s a significant dip overnight. Will do some morning & evening Ph retesting over the weekend and make additional adjustments if necessary. [end]